Initial python3 changes

Mostly just updating libraries, removing string encoding/decoding,
fixing some edge cases. No new functionality was added in this
commit.

lib/certgen.py

@@ -49,14 +49,14 @@ def createCertRequest(pkey, digest="md5", **name):
     req = crypto.X509Req()
     subj = req.get_subject()
 
-    for (key,value) in name.items():
+    for (key,value) in list(name.items()):
         setattr(subj, key, value)
 
     req.set_pubkey(pkey)
     req.sign(pkey, digest)
     return req
 
-def createCertificate(req, (issuerCert, issuerKey), serial, (notBefore, notAfter), digest="md5"):
+def createCertificate(req, xxx_todo_changeme, serial, xxx_todo_changeme1, digest="md5"):
     """
     Generate a certificate given a certificate request.
 
@@ -71,6 +71,8 @@ def createCertificate(req, (issuerCert, issuerKey), serial, (notBefore, notAfter
                digest     - Digest method to use for signing, default is md5
     Returns:   The signed certificate in an X509 object
     """
+    (issuerCert, issuerKey) = xxx_todo_changeme
+    (notBefore, notAfter) = xxx_todo_changeme1
     cert = crypto.X509()
     cert.set_serial_number(serial)
     cert.gmtime_adj_notBefore(notBefore)